All-metal adjustable jack strap



Feb. 27, 1945. Q H, Km 2,370,405

ALL METAL ADJUSTABLE JACK STRAP FiledNqv. 5, 1943' Inventor CZWRLEX/X /fm/ ventional jack Patented Feb. 27, 1945 UN 1 TED STAT ES NT j OF Fl C E. a

ALL-METAL ADJ QFAGKSTBAP Charley H. Kin g, Rockingham, N. G. Application November 5, 1943, Serial No. 509,104

3 Claims.

This invention relates to a new type, all metal jack strap for looms, the same having more particular reference to the jack strap which constitutes an operating connection between the constick and underlying treadle stirrup.

As is a matter of common knowledge to persons skilled in the art to which the invention appertains, the operating connection between the jack stick and the treadle stirrup" is in the form of a simple buckle-equipped leather jack strap. These straps, however, are subject to frequent breakage and occasion considerable annoyance and delay. This in turn necessitates shutting down the loom and its attending time-consuming and other equally annoying results. By substituting for the leather and similar type connectors and straps the improvement herein shown and described, the objections and difliculties alluded to are virtually overcome.

In determining upon a style and. form of connector in keeping with the principles of the instant invention, I have adopted for use a comparatively simple and economical structure characterized primarily by a pair of threaded shankequipped hooks and a turnbuckle adjustably connecting the shanks.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawing.

In the drawing, wherein like numerals are employed to designate like parts throughout the views:

Figure 1 is a view showing a fragmentary portion of the harness jack or so-called jack stick, the underlying right angularly disposed treadle and stirrup, and the improved connecting device, or jack strap occupying its operating posi- I I tion.

Figure 2 is an enlarged vertical sectional View taken on the plane of the line 2-2 of Figure 1.

Figure 3 is a cross section on the line 3-3 of Figure 2.

Referring now to the drawing by distinguishing reference numerals, it will be noted that the harness jack or jack stick is indicated at A. The right angularly disposed toothed treadle or lever is denoted by the character B, this being provided with a clevis or stirrup C. In practice the jack stick is provided with means to accommodate the jack strap. In Figure 1 a. simple slot D is used forthis purpose. In other forms of sticks a U-shaped, wire-type saddle is utilized. However, these are conventional parts and have nothing to do with the novelty, since this resides in the particular construction of the jack strap or connector 4. I

The device 4 comprises an upper U-shaped hook 5, one leg of which is provided with a screwthreaded shank 6. The seat portion is lined with a leather or equivalent pad 1 riveted Or otherwise secured in place, as at 8, whereby to adapt said hook to insertion in and anchorage upon the apertured portion of the jack stick A. A corresponding adapter and attaching hook- 9 is employed at the bottom. This is engaged with the stirrup C and provided with a screw threaded shank or stem In. The shanks 6 and it are ad justably connected by a turnbuckle frame II.

The numeral I2 merely designates lock nuts 00- acting with the respective shanks and adjacent end portions of the turnbuckle frame.

As shown and described, the novel adjustable connector, which is all metal and serves as a substitute for the conventional leather jack strap,

occupies the same position as said leather jack strap when in use. When the jack stick A is provided with a slot D, the hook 5 is simply passed through the slot D and held in place as disclosed in the drawing. If the jack stick is provided with a wire yoke or saddle, then the hook 5 is engaged in the bight portion of the saddle. The lower hook 9 is engaged in the clevis or stirrup C and the turnbuckle means constitutes a satisfactory adjustment for drawing the parts A and C together to bring about the desired tension and distribution of stresses and strains.

A careful consideration of the foregoing description in conjunction with the invention as illustrated in the drawing will enable the reader to obtain a clear understanding and impression of the alleged features of merit and novelty suflicient to clarify the construction of the invention as hereinafter claimed.

Minor changes in shape, size, materials and rearrangement of parts may be resorted to in actual practice so long as no departure is made from the invention as claimed.

I claim:

1. A connector device for disposition between and connecting with a jack stick and treadle on a loom comprising a turnbuckle, and duplicate hooks at opposite outer ends of said turnbuckle, one of said hooks being provided with a pad located in its crotch portion.

2. In a structural assemblage of the'class described, in combination, a conventional, centrally apertured loom jack stick, a conventional treddle lever at right angles to and beneath said jack stick, a clevis adjustably and detachably connected and mounted on said lever, a metal hook detachably connected with the intermediate apertured portion of said jack stick, the crotch portion of said hook being provided with a pad engaging the coacting edge portion of the aperture in said jack stick, said hook being provided with a screw-threaded shank, a second metal hook detachably connected with the adjacent portion of said clevis and provided with a screwthreaded shank in longitudinal alignment with said first-named shank, and a tum-buckle frame connecting said shanks, the latter being provided I with lock nuts engageable with the end portions of the turn-buckle frame.

3. A loom attachment of an all-metal construction adapted to replace a conventional leather jack strap comprising an upper metal hook having its crotch portion padded and adapted to engage in the existing aperture in a conventional jack stick, said hook embodying a screw-threaded shank, a second metal hook adapted for detachable connection with a clevis on a, conventional treddle, this provided with a screw-threaded shank in longitudinal alinement with the first named shank, and a turn buckle frame threaded at its ends and adjustably threaded on said shanks and provided with coacting lock nuts.

CHARLEY H. KING. 

